MachineCopyPropagation.cpp File Reference (original) (raw)

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Macros
#define	DEBUG_TYPE "machine-cp"

Functions
	STATISTIC (NumDeletes, "Number of dead copies deleted")
	STATISTIC (NumCopyForwards, "Number of copy uses forwarded")
	STATISTIC (NumCopyBackwardPropagated, "Number of copy defs backward propagated")
	STATISTIC (SpillageChainsLength, "Length of spillage chains")
	STATISTIC (NumSpillageChains, "Number of spillage chains")
	DEBUG_COUNTER (FwdCounter, "machine-cp-fwd", "Controls which register COPYs are forwarded")
	INITIALIZE_PASS (MachineCopyPropagationLegacy, DEBUG_TYPE, "Machine Copy Propagation Pass", false, false) void MachineCopyPropagation
static bool	isNopCopy (const MachineInstr &PreviousCopy, MCRegister Src, MCRegister Def, const TargetRegisterInfo TRI, const TargetInstrInfo TII, bool UseCopyInstr)
	Return true if PreviousCopy did copy register Src to register Def.
static bool	isBackwardPropagatableCopy (const DestSourcePair &CopyOperands, const MachineRegisterInfo &MRI)
static void	printSpillReloadChain (DenseMap< MachineInstr , SmallVector< MachineInstr > > &SpillChain, DenseMap< MachineInstr , SmallVector< MachineInstr > > &ReloadChain, MachineInstr *Leader)

◆ DEBUG_TYPE

#define DEBUG_TYPE "machine-cp"

◆ DEBUG_COUNTER()

DEBUG_COUNTER	(	FwdCounter	,
"machine-cp-fwd"	,
"Controls which register COPYs are forwarded"	)

◆ INITIALIZE_PASS()

INITIALIZE_PASS	(	MachineCopyPropagationLegacy	,
DEBUG_TYPE	,
"Machine Copy Propagation Pass"	,
false	,
false	)

◆ isBackwardPropagatableCopy()

◆ isNopCopy()

Return true if PreviousCopy did copy register Src to register Def.

This fact may have been obscured by sub register usage or may not be true at all even though Src and Def are subregisters of the registers used in PreviousCopy. e.g. isNopCopy("ecx = COPY eax", AX, CX) == true isNopCopy("ecx = COPY eax", AH, CL) == false

Definition at line 572 of file MachineCopyPropagation.cpp.

References TII, and TRI.

◆ printSpillReloadChain()

◆ STATISTIC() [1/5]

STATISTIC	(	NumCopyBackwardPropagated	,
"Number of copy defs backward propagated"	)

◆ STATISTIC() [2/5]

STATISTIC	(	NumCopyForwards	,
"Number of copy uses forwarded"	)

◆ STATISTIC() [3/5]

STATISTIC	(	NumDeletes	,
"Number of dead copies deleted"	)

◆ STATISTIC() [4/5]

STATISTIC	(	NumSpillageChains	,
"Number of spillage chains"	)

◆ STATISTIC() [5/5]

STATISTIC	(	SpillageChainsLength	,
"Length of spillage chains"	)

◆ EnableSpillageCopyElimination

cl::opt< cl::boolOrDefault > EnableSpillageCopyElimination("enable-spill-copy-elim", cl::Hidden) ( "enable-spill-copy-elim" , cl::Hidden )	static

◆ MCPUseCopyInstr

cl::opt< bool > MCPUseCopyInstr("mcp-use-is-copy-instr", cl::init(false), cl::Hidden) ( "mcp-use-is-copy-instr" , cl::init(false) , cl::Hidden )	static